LLVM Techniques, Tips, and Best Practices Clang and Middle-End Libraries by Min-Yih Hsu

Author:Min-Yih Hsu
Language: eng
Format: epub
Publisher: Packt Publishing Pvt Ltd
Published: 2021-01-22T00:00:00+00:00

Creating the toolchain and adding a custom include path

In this section, we are going to create the skeleton for our Zipline toolchain and show you how to add an extra include folder path – more specifically, an extra system include path – to the compilation stage within Zipline. Here are the detailed steps:

Before we add a real toolchain implementation, don't forget that we are going to use a custom driver flag, -zipline/--zipline, to enable our toolchain. Let's use the same skill we learned in the previous section, Adding custom driver flags, to do that. Inside clang/include/clang/Driver/Options.td, we will add the following lines:// zipline toolchain

def zipline : Flag<["-", "--"], "zipline">,

Flags<[NoXarchOption]>;

Again, Flag tells us this is a boolean flag and NoXarchOption tells us that this flag is driver-only. We will use this driver flag shortly.

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